论文标题
在重力波推理中常规使用亚域的谐波:与X一代波形模型的GW190412重新分析
Towards the routine use of subdominant harmonics in gravitational-wave inference: re-analysis of GW190412 with generation X waveform models
论文作者
论文摘要
我们重新分析具有最先进的现象学波形模型的引力波事件GW190412。这项事件与黑洞合并有关,由于亚辅助谐波的重大贡献而引人入胜。我们使用频域和时域波形模型。现象波形模型构成了黑洞二元合并的第四代频域现象学波形。最近,它们得到了时间域现象模型的补充,该模型开辟了新的策略,以模拟进动和偏心率,并通过现象学波形方法进行一般相对性测试。 Phenomx和Phenomt均已使用相似的技术和准确性目标构建,并且由于其计算效率,这种“ X代”模型家族允许在贝叶斯推论中常规使用亚尺寸的球形谐波。我们展示了这些GW190412的这些与其他最先进的波形模型之间的良好一致性,并讨论了对上一代现象学波形模型的改进。我们还讨论了贝叶斯推论的实际方面,例如运行收敛,抽样参数的变化和计算成本。
We re-analyse the gravitational-wave event GW190412 with state-of-the-art phenomenological waveform models. This event, which has been associated with a black hole merger, is interesting due to the significant contribution from subdominant harmonics. We use both frequency-domain and time-domain waveform models. The PhenomX waveform models constitute the fourth generation of frequency-domain phenomenological waveforms for black hole binary coalescence; they have more recently been complemented by the time-domain PhenomT models, which open up new strategies to model precession and eccentricity, and to perform tests of general relativity with the phenomenological waveforms approach. Both PhenomX and PhenomT have been constructed with similar techniques and accuracy goals, and due to their computational efficiency this "generation X" model family allows the routine use of subdominant spherical harmonics in Bayesian inference. We show the good agreement between these and other state-of-the-art waveform models for GW190412, and discuss the improvements over the previous generation of phenomenological waveform models. We also discuss practical aspects of Bayesian inference such as run convergence, variations of sampling parameters, and computational cost.